HEMT-based 1K front-end electronics for the heat and ionization Ge CryoCube of the future RICOCHET CE$\nu$NS experiment - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

HEMT-based 1K front-end electronics for the heat and ionization Ge CryoCube of the future RICOCHET CE$\nu$NS experiment

Résumé

The RICOCHET reactor neutrino observatory is planned to be installed at the Laue Langevin Institute (ILL) starting mid-2022. Its scientific goal is to perform a low-energy and high precision measurement of the coherent elastic neutrino-nucleus scattering (CE$\nu$NS) spectrum in order to explore exotic physics scenarios. RICOCHET will host two cryogenic detector arrays: the CryoCube (Ge target) and the Q-ARRAY (Zn target), operated at 10 mK. The 1 kg Ge CryoCube will consist of 27 Ge crystals instrumented with NTD-Ge thermal sensors and charge collection electrodes for a simultaneous heat and ionization readout to reject the electromagnetic backgrounds (gamma, beta, x-rays). We present the status of its front-end electronics. The first stage of amplification is made of High Electron Mobility Transistor (HEMT) developed by CNRS/C2N laboratory, optimized to achieve ultra-low noise performance at 1K with a dissipation as low as 15 $\mu$W per channel. Our noise model predicts that 10 eV heat and 20 eVee RMS baseline resolutions are feasible with a high dynamic range for the deposited energy (up to 10 MeV) thanks to loop amplification schemes. Such resolutions are mandatory to have a high discrimination power between nuclear and electron recoils at the lowest energies.

Dates et versions

hal-03467336 , version 1 (06-12-2021)

Identifiants

Citer

G. Baulieu, J. Billard, G. Bres, J-L Bret, D. Chaize, et al.. HEMT-based 1K front-end electronics for the heat and ionization Ge CryoCube of the future RICOCHET CE$\nu$NS experiment. 19th International Workshop on Low Temperature Detectors, Jul 2021, Online Conference, United States. pp.570-580, ⟨10.1007/s10909-022-02896-5⟩. ⟨hal-03467336⟩
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